From 8231cf4e14e323a4d3d240c051984f32b83885bb Mon Sep 17 00:00:00 2001
From: Aryadev Chavali <aryadev@aryadevchavali.com>
Date: Thu, 5 Mar 2026 22:20:10 +0000
Subject: [PATCH] allocator: "padding" field for alloc_metadata_t,
 static_assert on sizeof

---
 include/alisp/allocator.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/alisp/allocator.h b/include/alisp/allocator.h
index abfff3b..e5fad80 100644
--- a/include/alisp/allocator.h
+++ b/include/alisp/allocator.h
@@ -15,10 +15,14 @@
 
 typedef struct
 {
+  u64 padding : 56;
+  tag_t tag   : 8;
   u64 references;
-  tag_t tag : 8;
 } alloc_metadata_t;
 
+static_assert(sizeof(alloc_metadata_t) == 16,
+              "16 byte metadata required for alignment purposes");
+
 typedef struct
 {
   alloc_metadata_t metadata;